Method and apparatus for retrieving information from a 3D storage medium
US7269118B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2003 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Dec 20, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for retrieving information from a three dimensional storage medium uses a three dimensional storage medium having an active medium capable of exhibiting first and second states, a data unit being represented by the ratio between the concentration of the first and second states in a given volume portion of the medium and a data sequence is represented by a sequence of data units. The active medium is irradiated with light as to concentrate light flux through a volume portion of the storage medium so as to generate in the volume portion a detectable non-linear optical response characteristic of the concentration ratio, which is detected and used for tracking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.